Men who wake up several times a night to pee should try exercising more, according to a study out of Loyola University in Chicago.

It's estimated more than half of men 45 and older experience nocturia (waking two or more times to urinate), and it increases with age because of common conditions like enlarged prostate and reduced bladder capacity.

Researchers analyzed data on more than 4,700 men aged 55 to 74, and found those who were physically active were 13% less likely to report nocturia, and 34% less likely to report severe nocturia (waking three or more times to urinate) than those who weren't active.

The study says exercise of one or more hours per week may help in several possible ways: by reducing body size, improving sleep and lowering levels of systemic inflammation.

The findings were published in the journal Medicine & Science in Sports & Exercise.